Ubuntu 12.04 LTS in Virtualbox SLOOOOOWWWWWW

I've been trying to install Ubuntu 12.04 LTS in Virtualbox 4.2.4 for about a week now.  It would install eventually, but it was slow to do so, and almost unbearable to actually try to use.  Someone mentioned that if you had multiple CPUs configured for the VM, change it to one.  I had only one CPU assigned, so I changed it to two, and restarted my install.  It completed in less than five minutes.  Moral, if your having performance issues installing or using Ubuntu 12.04 LTS, make sure you're using more than one CPU.